The calculated distance (air line) between Martignacco and Reggio nell'Emilia is approximately 155 miles respectively 250 kilometers.
By car or train, the actual journey to Reggio nell'Emilia is certainly longer, as only the direct route (as the crow flies) between Martignacco and Reggio nell'Emilia has been calculated here.
Air line (approximately)
250 kilometers
135 nautical miles